21211001001002 has 8 divisors (see below), whose sum is σ = 32842840259712. Its totient is φ = 10263387581100.

The previous prime is 21211001000963. The next prime is 21211001001007. The reversal of 21211001001002 is 20010010011212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21211001001007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171056459624 + ... + 171056459747.

It is an arithmetic number, because the mean of its divisors is an integer number (4105355032464).

Almost surely, 2^{21211001001002} is an apocalyptic number.

21211001001002 is a deficient number, since it is larger than the sum of its proper divisors (11631839258710).

21211001001002 is a wasteful number, since it uses less digits than its factorization.

21211001001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342112919404.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21211001001002 its reverse (20010010011212), we get a palindrome (41221011012214).

The spelling of 21211001001002 in words is "twenty-one trillion, two hundred eleven billion, one million, one thousand, two".